The name steward means:

  S - SUM/DIFFERENCE IDENTITIES
  T - TOOLKIT FUNCTIONS
  E - EVEN NUMBER
  R - REGULAR POLYGON
  L - LEMNISCATE
  I - INVERSE SINE
  N - NTH PARTIAL SUM
  G - GAMBLING ODDS

sterling means:
of high quality: pure.: Also variant of a name given pre-medieval refiners of silver meaning easterner. Surname.

  S - SCHMALTZY
  U - UNSUSTAINING
  S - SERRIED
  Y - YAULD

susy means:
Lily

  S - SUCCESS
  E - EXCITING
  A - APPEALING
  N - NUTRITIOUS

sean means:
Gift from God. Form of John from the French Jean.